3Bxxxxx-xxx-10GC中文资料3BSeriesSPECIFICATIONSSTANDARD*SPECIALELECTRICALCenterFrequency(Fc)2000to12000Mhz1000to18000MHz3dBRelativeBandwidth(%ofFC)3to202to70NumberofSectionsAvailable3to102to14NominalImpedance50Ohms50OhmsMaximumInsertionLossSeeCurveSeeCurveMaximumVSWR1.5/11.3/1AttenuationintheStopbandSeeGraphSeeGraphMaximumInputPower(Average)(Wattsto10,000ft.)10%ifpeakSeeStandardMaximumInputPower(Peak)(Wattsto10,000ft.)1000x3dBBW(MHz)Fc(MHz)SeeStandardENVIRONMENTALShock25G's50G'sVibration10G's20G'sLarkEngineering3BSERIES(1of4)[1/17/20022:28:39PM]元器件交易网www.cecb2b.comHumidity90%relative100%relativeAltitudeUnlimitedUnlimitedTemperatureRange(Operating)-25to+50degreescelsius-54to+100degreescelsiusTemperatureRange(Non-Operating)-54to+70degreescelsius-62to+150degreescelsiusMECHANICALApproximateWeightinoz.0.8xHxL0.7xHxLMountingProvisionsSeebelowSeebelowSpecialConfigurationsConsultFactoryConsultFactoryINSERTIONLOSS:TheMaximumInsertionLossatcenterfrequencyisequalto:LFx(N+0.5)/%3dBBW+0.1Where:LF=LossFactor,N=NumberofSections%3dBBW:3dBBW(MHz)x100dividedbyCenterFrequency(MHz)Example:A5section3Bwithacenterfrequencyof10000MHzanda3dBBWof500MHzwouldhave,.9x5.5/5=0.990.99+0.1=1.1dBMECHANICALSPECIFICATIONSLDimension=Nx(0.3+0.5/%BW)+1.0inchApproxHDimension=1450/Fc(MHz)+0.6inchApprox.ConnectorsAvailableon3BSeriesLarkCodeTypeCDIM.Inches&MMLarkCodeTypeCDIM.Inches&MMASMAJACK.375&9.5*GNJACK.736&18.7BSMAPLUG.507&12.9*HNPLUG.819&20.8*CTNCJACK.750&19.1SSPECIAL*DTNCPLUG.844&21.4*NotrecommendedforusewiththisSeriesThesizeshownisastandardusedbyLarktofacilitatealowcost,easilyreproducibleunit.Shouldyourequireanothersize,pleasesubmitallofyourrequirements-bothelectricalandmechanical.ThiswillenableLarkEngineeringtoquotetheoptimumdesignforyourapplication.STOPBANDSPECIFICATIONSThegraphsonthefollowingpagesdefinethenormalspecificationlimitsonattenuationLarkbandpassfilterseries2B,3B,and4B.TheminimumlevelofattenuationindBisshownasa"numberof3dBbandwidthsfromcenterfrequency".Sincethefrequencycharacteristicsvaryfordifferingbandwidths,itisnecessarytoestablishspecificationsforeachbandwidthoffilter.Thedifferentgraphsrepresentvarious3dBpercentagebandwidths.Intermediatevaluesshouldbeinterpolated.The3dBpercentagebandwidthisdefinedasfollows:3dBBandwidth(MHz)x100dividedbyCenterFrequency(MHz)Theexactrelationshipisasfollows:1.3dBBandwidthsFromCenterFrequency=RejectionFrequency(Mhz)-CenterFrequency(Mhz)dividedby3dBBandwidth(Mhz)Example:Given:2.CenterFrequency=5000MHzMinimum3dBBandwidth=500MHzNumberofSections=5Find:Minimumattenuationlevelsat4250MHzand5800MHz.3dBBW'sfromFc=4250-5000/500=-1.5and5800-5000/500=+1.6Theanswercanbereaddirectlyfromthe10%graph.Usingthe5sectioncurveatthepoint-1.5(4250MHz)wefindtheminimumlevelofattenuationis40dB.At+1.6(5800MHz)theminimumlevelofattenuationis50dB.Forspecialrequirements,pleasecontactourApplicationEngineeringDepartment.STOPSP3.HTM元器件交易网www.cecb2b.comSTOPBANDSPECIFICATIONSSTOPBANDSPECIFICATIONSSTOPSP3.HTM元器件交易网www.cecb2b.comSTOPBANDSPECIFICATIONS
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